Hi Ismael,

Thanks for the speedy reply! The current option I’m using is “Image List”.

I located the line within functions.php, but I’m not exactly sure what to do with it. I tried removing the line entirely, as well as inserting new size values–neither of which solved the issue. I also installed the Regenerate Thumbnails Plugin, which had no effect.

Here is an example of what I’m experiencing:

I added the following image to the Preview Images Gallery:
http://stevemonfilscreative.com/wp-content/uploads/2014/02/infographic-design-data-rich-insight-poor.jpg

When I inspected the HTML output, it replaced that image with this much smaller version:
http://stevemonfilscreative.com/wp-content/uploads/2014/02/infographic-design-data-rich-insight-poor-266×1030.jpg

It appears as though any image with an original size above 1030px (in height) is being automatically replaced with these smaller images. I tried forcing the width of the image to 100% width of its container, but that’s not a very good solution, since it just enlarges the small version, making it pixelated.

I’d like for the images to simply occupy 100% of the width of their container (using the original image version), if that makes sense. Whatever I can do to fix this would be great. Your help is much appreciated.

Thanks,
Steve